Does students with masters Degree complete their PhD's (in US but I am curious about other countries too) sooner than the one's who have entered the PhD program after their undergrad.

I know it depends upon the individual, project, major and the supervisor but is their a journal trend?

Do students with Masters Degree complete their PhDs (in US, but I am curious about other countries too) sooner than the one's who have entered the PhD program after their undergrad?

I know it depends upon the individual, project, major and the supervisor but is there a general trend?